PDF malware analysis — malicious · eadab4d967136ff0

MALICIOUS

PDF

70.1 KB Created: 2021-10-01 12:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 26f8ab08f60e9c4d04b246529de48756 SHA-1: df01cfdb1d7a8c5293ff1a3ea21a9e92a26770a4 SHA-256: eadab4d967136ff05118e7d19a8ae985e40e15b50119b521f7ae71280c62475b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://huntic.ru/uplcv?utm_term=auto+call+recorder+pro+apk+full+cracked PDF link annotation
- http://bifruit.mk/ckfinder/userfiles/files/dosupivenugosejigej.pdfIn PDF document text
- http://esllearningbydesign.com/app/webroot/files/file/39133123065.pdfIn PDF document text
- http://geombiagioschettino.eu/userfiles/files/ririmejidoxovujogeroba.pdfIn PDF document text
- https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/94748535d286d4f20d0407982ba19e58/somuji.pdfIn PDF document text
- https://reparationmobile.net/userfiles/file/pewimanetizamis.pdfIn PDF document text
- https://jokerprod.net/userfiles/file/fuvunifegeloluwuxegufut.pdfIn PDF document text
- http://loveperfectionschool.com/upload/file/sivuron.pdfIn PDF document text
- https://brigitte-farner.ch/userfiles/files/jigekot.pdfIn PDF document text
- http://xn--eyt274i.com/upload/files/xivepuxugajewijijomilibub.pdfIn PDF document text
- https://www.nvsrolko.org/ckfinder/userfiles/files/leresabiluwufewerapeforuf.pdfIn PDF document text
- http://tidomusica.com/uploads/files/202109281030485007.pdfIn PDF document text
- http://lonniestireandauto.com/nbloom/fckuploads/file/25002931425.pdfIn PDF document text
- https://tidaksusah.com/contents/files/60713849136.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2f8de1fb0ef1e2bee2d70a58df95706c/nibova.pdfIn PDF document text
- https://confidence-ist.com/ckfinder/userfiles/files/teropomifigupirikex.pdfIn PDF document text
- http://rtm-plus.ru/ckfinder/userfiles/files/midigunipuwuvaloz.pdfIn PDF document text
- http://saraiaser.nl/userfiles/file/dumadurolasurojipifafo.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/nlooar0qu37koof087n4tuia3c/lodudipidiwodazopaweto.pdfIn PDF document text
- http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161369663810ce---29509603592.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/161528757dc37d---fovutozutupaloxo.pdfIn PDF document text
- http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/tukujugomo.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c004e6aef8---rebejalazotakime.pdfIn PDF document text
- https://xn--90ah6akb9e.xn--p1ai/f/file/57221618243.pdfIn PDF document text
- https://mytalk7.com/_UploadFile/Images/file/zoledo.pdfIn PDF document text
- http://salocchi.it/userfiles/files/godagofazu.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b0a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB0A1	10420 bytes
SHA-256: `e0e221a7d1b54f21683c5d2fbd37ae96c806467d2e12d3e2a628610b2ab3b52c`
`font_01_sfnt_off0000c86e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC86E	16048 bytes
SHA-256: `ddcad9e23ba2d8f3fb4f341531fa089bd54ef1e8cadf22dd402d444a73d3c6a6`
`font_02_sfnt_off0000f10d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF10D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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